Speed-indicator.



J.B.GRAY. SPEED iNDlCATOR.

' APPLICATION FILED OCT. 19. I914.

Patented Dec. 3, 1918.

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A further object of theinve1ition is to provide, in such adevice, asimple means; for predetermining the point at which the i a M B em; Deae t .O QA a.

sPnEn-Innrcn'ron. i y

To all whom it may concern .1 F Be it known that I, JAMEs B. GRAY, acitizen of the United States, residing at Sidney, in the county ofShelby and State of Ohio, have invented certain new and usefulImprovements inSpeed-Indicators, of which the following is aspecification. This invention relates to improvementsfin speedindicators for rotary shaft elements. The object of theinvention istoindicate the speed at which the shaft is rotatingyand to automaticallysound an alarm to indicate that the speed of such revolvingpart has notreached the speed desired, and to become silent when the desired speedhas been reached or exceeded, thus giving the operator an opportunity toincrease the speedor take such other action as the the caseinayrequire." a y a l y i The device about tobe described is intendedprimarily for use on cream separa: tors, where it may be attached to thecrank handle, crankshaftyor it may beused in connection with othermachinery. w l

The object of the invention is to provide an extremely simpledeviceofthe character mentioned, easy of attachment to the rotate ing element,reliable in operation, and not alarm will cease to be sounded, that isto say,with regard to the speed of the rotatingparts' 1 Referring to thedrawings g Figure l is a side elevation of the device, the bellbodybeing removed to show the interior construction, and thedevice.shownat tached to the crank arm of a cream separator or the like; i i 7 Fig.2 is a section taken on line "a -a of Fig. 1, showing the bell-"body orgong in its proper relative position to the rest of the Fig. 3 is acentral vertical section of the indicator; t

Fig. 4: 1s an elevation of the device secured to a crank showing thebracket swung to a position opposite that shown in Fig. 1. Referring tothe drawings, thenumeral 1 designates a plate having therein anelongated slot 2 extending for substantially the full length thereof.This plate is provided with an offset portion 3 provided with anaperture 4:, for the reception of the standard Specification of Lettersexigencies of i .lPateiitedDec.

l" ofa crank handle e the speed of whose shaft isdesired to beindicated. 1 a

i The numeral 5 designates abase plate de-.

of the bell-clapper is pivoted to a short stud 11, on the baseplate, andis prevented from striking but one sideofthe bell body 9by a lug; 112*secured vto the plate 5, with which the head 8 comesin contact duringonepart of the revolution of the. device.

In operation, the device being connected with the shaft orrotatingpartfso thatit will rotate ina plane at right angles to saidshaft on part, the whole device willbe rotated each time it,ithe shaft,"is rotated, the headS of thefbell-clapper or pendulum 1'? will come incontact with the bell body 19 once with every revolutionof the device,striking the bell at the topof the circle of revolution and strik ingthe lug atopposite points inthe revolution, but consequentlymakingnosound at such opposite point? This striking of the bell'with eachrevolution ofthe device, indicates that the rotatinguelement is rotatingat acomparatively10Wspeed er inifact enough to cause the alarm.Whenfliowever, the speed ofirevolutioii increases, the centrifugal forcegeneratedin the pendiilum or belLcla-p er, counterbalancing the weightof: the bell clapperptheibell will cease to ring,

obviously by reason of the fact :that the bell-:

clapper will cease toifall" inwardly at the top of the circle ofrevolution. By adjusting the b ell; and parts carried thereby,'withrelation tothe axis of rotation for any given speed, the bell willceaseto ring when said speed is attained. i

It will be noted that the bracket 1 is pivotally and adjustably securedto the end of the crank 4:". This permits the bracket to be swungrelative to the crank 4;, to any position between that. shown in Fig. 1and a position diametrically opposite, and when so swung it is obviousthat what is now the upper end of the slot? inthe bracket, be-

comes the outer end or end farthest from the center of revolution of therevolving element, and as the sounding device may be adjusted to occupyany desired position within the slot 2, it follows that a greater rangeof movement is provided for than would be the case if it were possibleonly to adjust the sounding device within the slot when the bracket isin the position shown in Fig. 1. This arrangement obviates the necessityof adjusting the bell within the slot to obtain increased or diminishedvibrations, as this is accomplished by merely adjusting the slotted armrelative to the crank.

This is particularly advantageous in application to slow moving rotatingmachine parts and particularly applicable to cream separators where itis desired and required that a certain speed be attained, below whichthe work is not eiiiciently done.

Having thus described my invention, What I claim is:

1. The combination with a rotary element, a bracket movably connectedthereto and arranged for arcuate adjustments about its point ofconnection to the rotary element, and a sounding device carried by thebracket and adjustable relative thereto, and arranged to have itsvibrations varied by shifting the positions of the bracket relative toits point of connection with the rotary element.

2. In a device of the character described, the combination with arotatingelement, a plate carried thereby and provided with anelongatedslot, a sounding device adjustably held in said slot and havingtherem a pivoted pendulum adapted to contact with the sounding deviceupon each revolution ofthe rotating element, until, by the increasedspeed of the rotating element, the centrifugal force exerted upon thebell-clapper, will hold it out of contact with the sounding device, tocause the'sounding to cease, means for limiting the movement of thependulum inone direction, and means for adjustably holding the soundingdevice in said slot.

3. In a device of the character described, the combination with a rotaryelement, of a slotted arm'movably connected thereto and arranged forarcuate adjustments about its point of connection to the rotary element,-a sounding device held adjustably mounted in Copies of this patent maybe obtained for the slot in said arm, and means for holding the same inadjusted position therein, and a bell'clapper pivoted within thesounding device and adapted to contact therewith upon each revolution ofthe rotating element until, by increased speed of the rotating element,the centrifugal force exerted upon the bell clapper will hold it out ofcontact with the sounding device and cause the sounding to cease.

4:. In a device of the character described, the combination with arotating element, a bracket movably connected thereto and arranged forarcuate adjustments about its point of connection to the rotatingelement, a sounding device held adjustably on the bracket, and means forholding the same in adjusted position thereon, and a bell clapperpivoted within the sounding device, eccentric to its center and adaptedto contact with said sounding device upon each revolution of therotating element, until by increased speed of the rotating element, thecentrifugal force exerted upon the bell clapper will hold it out ofcontact with the sounding device to cause the sounding to cease.

5. The combination with a rotary element, of a bracket carrying asounding device adjustable in said bracket and having pivotal connectionwith the rotary element, and ad justable about said pivot whereby thevibrations of the sounding device may be increased or diminished by thearcuate adjustment of the bracket relative to the pivot of the bracket.

6. The combination with a rotary element, a bracket movably connectedtherewith, and arranged for arcuate adjustments about its point ofconnection to the rotary element, and a sounding device adjustablycombined with the bracket and arranged to have its vibrations variedeither by shifting its position relative to the bracket, or by swingingthe bracket to or away from the rotary element.

In testimony whereof I aflix my signature in presence of two witnesses.

JAMES B. GRAY.- Witnesses:

C. It. Hess, J. V. KOOGLER.

five cents each, by addressing the Commissioner of Iatents. Washington,D. 0.?

